The high-impact, HD screens are the first of their format in the UK. Research by Exterion Media and Bournemouth University last year showed them to be four-times more engaging than traditional OOH ads.

The design allows ads to seamlessly flow across the full length of the screens, offering a "stand-out" creative canvas to engage London commuters. The digital screens have the potential to reach 15 million commuters each month, according to Exterion.

The larger screens, which now sit where the hordes of smaller displays once were, coupled with new formats and these next-generation digital escalator panels have helped Exterion in its mission to overhaul the outdoor category in this way.

Chris Reader, head of commercial media, TfL, said: “Our new digital ribbon screens at three of our most iconic Tube stations are a fantastic addition to our advertising estate, making it more attractive to brands by allowing them to engage with the London audience and create more memorable moments for our customers.

"We are continuing to invest in our advertising estate, which is already one of the most valuable in the world, and enables us to raise vital revenue to reinvest back into the transport network.”